Improvement in harrows



NiTED STATES,`

PATENT OFFICE.

., JJOHN H. ELWARD, on oTTAWAyiLLINoIs..

, IMPROVEMENT iN HARRows.

Specification forming part of Letters Patent No. 40,614, dated ovember 17, 1 863.

To all whom it may concern:

Be it known vthat I, JOHN H. ELWARD, of. Ottawa, in the county of LaS-alie and State of Illinois, have invented certain new and usefulV Improvements in Combined Olod-Breaker and Harrow.; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference beinghad to the accompanying drawings, in whichlthe'clods are cut and crushed as the implement is drawn over the field.

To enable others skilled in the fait to make 4and use my invention, I will proceed to de-l scribe its construction and operation. A A represents straight,- c'onvex. or elliptical bars, which are connected together-bymeans of links or hinged joints B. The joints B are yiirmly secured tothe ends of the bars Aby means of nails or pins c.

.C represents iron spikes .or teeth, which-are f 'secured within thebars A. That part of the spikes() which is u sedin harrowing is ofthe ordinary shape of a barrow-tooth; but the part c,"which is used in'breaking clods',is a short tooth which may bel a prolongation of theharrow-tooth,and which has asharp.inclined-edge at vits front, 'as represented-'in a i perspective f view'in'Fig. 3. The position ofthe, bars A whenl used for 'breakin gclods 'is such asirepresented" in". Figui. They'areinclned {s o that the front edge, l, is' raised higher above the ground than the rear edge, 2, and'l in' passing f over the ground the clods b (represented in red) are caught by the inclined bars as the clods pass lunder the front edges, and as the y bar advances the clod is cut by the short tooth, and is crushed as the 'oar passes clear over it. The bars A may be sufticiently weighted to perfor'm'said operation properly. The bars A being hinged together by means ot" thelinks B, they can adapt themselves to the inequalities' of the ground, or can rise' if heavyclods should accumulate under them which may notv be crushed by the action of the first bar upon them. In that ease the succeeding bars will perform' the work as well by cutting up theclods by means of their teethas by crushing them by their weight, andthe bars by their pecnliar shape are sure of catching all vthe clods,

which are in their track, and each `loa'r leaves to the succeeding one the werk which it has not completed.

'Several harrows or clod-breakers, as de.`

scribed, may be secured to one ivhifletree, to

be pulled-by on'e team.

f When the apparatus 1s to be used as a harrow it is Aturned upside down, so that the han -row-teeth come in contact with the ground, and

it then operates like an ordinary barrow.

Having thusv fully described the natureof.`

my invention, what I claim ,herein as new, and desire Vto secure by Letters Patent,.is A

1. In combination with the convex or elliptical bars A, the'short inclined teeth c, when constructed and operated substantially in the manner audfor the purposes hereii. described.-

2. In combination'with thectnvex or ellipti cal bars A and short inclined teeth c, the links B, substantially in the mannera'gndl forthe p'urposes described. i

f3. In combination with the elliptical hinged 'bars'A, the barrow-teeth C and,the short clodbreaking teethc, when the latter are theprolongatlon ofthe former, substantially in the manner and for lthe purpose described.

`J. n. ELWARD.' 

